Analysis of water and ice content during rock freezing based on the three-valued segmentation of frozen rock CT images

CT scanning test of rock sample at different frozen temperature was carried out by GE Lightspeed 64 VCT X-ray High Resolution Computerized Tomography, 20 different slices were scanned at each time, slice interval is 3.75 mm. Due to space limitation, we only list CT images and its analysis of 2 slices of red sandstone in this paper. Scanning localization is shown in Figure 1. CT scanning parameters is shown in Table 2.